\documentclass[UTF8, 11pt, oneside]{ctexbook}
\include{ds3-styles}

\begin{document}

\include{ds3-title-page}

\frontmatter
\include{units/ds3-explanation}

\tableofcontents
\thispagestyle{empty}

\mainmatter
\include{units/ds3-ch1}
\include{units/ds3-ch2}
\include{units/ds3-ch3}

\end{document}
